"As a butcher, it just can't be that we have to get into plastic!" said Paolo Desbois, an 18-year-old French butcher, referring disparagingly to the synthetic burgers, sausages and nuggets at the IFFA meat industry convention.

The concept that animals are meat -- and plants are not -- never used to challenged.

But increasingly plant-based protein products are trying to muscle in on the meat market.

Derived from sources like soy, peas or beans, the synthetic products are being manufactured without using animals.

And Desbois, who placed second in a young butchers competition at the convention, feels they undermine "the essence of the profession".